PACCAR MX (2004 Emissions) Fault Code: P222D Internal ECU Ambient Pressure – Internal Error
PACCAR MX (2004 Emissions) Fault Code: P222D Internal ECU Ambient Pressure – Internal Error
SET CONDITIONS:
The PCI ECU (D420) detects that the internal ambient pressure sensor is faulty.
DIAGNOSTIC CONDITION:
This diagnostic runs continuously when the ignition is on.
CORRESPONDING OBD READINESS MONITOR:
None
RESET CONDITION:
This DTC changes to inactive when the fault is no longer detected.
REPAIR VERIFICATION:
1. Clear all DTCs.
2. Test drive or operate the vehicle to meet the diagnostic conditions and set conditions.
3. Did the DTC come back?
– No, repair successful
– Yes, repair unsuccessful
POSSIBLE CAUSES:
Faulty pressure sensor, internally in ECU
ADDITIONAL INFORMATION:
The PCI ECU has an internal ambient pressure sensor in the housing. The ambient pressure sensor is not serviceable.
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